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Unique Binary Search TreesTotal Accepted:69271Total Submissions:191174Difficulty:MediumGivenn, how many structurally uniqueBST's(binary search trees) ... 阅读全文
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Validate Binary Search TreeTotal Accepted:73179Total Submissions:359616Difficulty:MediumGiven a binary tree, determine if it is a valid binary search ... 阅读全文
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Populating Next Right Pointers in Each NodeTotal Accepted:72323Total Submissions:199207Difficulty:MediumGiven a binary tree struct TreeLinkNode { ... 阅读全文
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Binary Tree Right Side ViewTotal Accepted:28755Total Submissions:92186Difficulty:MediumGiven a binary tree, imagine yourself standing on therightside ... 阅读全文
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Sum Root to Leaf NumbersTotal Accepted:63531Total Submissions:202910Difficulty:MediumGiven a binary tree containing digits from0-9only, each root-to-l... 阅读全文
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Binary Search Tree IteratorTotal Accepted:34935Total Submissions:109369Difficulty:MediumImplement an iterator over a binary search tree (BST). Your it... 阅读全文
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Binary Tree PathsTotal Accepted:26174Total Submissions:104545Difficulty:EasyGiven a binary tree, return all root-to-leaf paths.For example, given the ... 阅读全文
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1、Lowest Common Ancestor of a Binary Search Tree Total Accepted: 42225 Total Submissions: 111243 Difficulty: Easy Given a binary search tree (BST), fi 阅读全文
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Invert Binary TreeTotal Accepted:55757Total Submissions:132365Difficulty:EasyInvert a binary tree. 4 / \ 2 7 / \ / \1 3 6 9to 4... 阅读全文
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Path SumTotal Accepted:81706Total Submissions:269391Difficulty:EasyGiven a binary tree and a sum, determine if the tree has a root-to-leaf path such t... 阅读全文
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Same TreeTotal Accepted:98221Total Submissions:232503Difficulty:EasyGiven two binary trees, write a function to check if they are equal or not.Two bin... 阅读全文
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Symmetric TreeTotal Accepted:84678Total Submissions:259420Difficulty:EasyGiven a binary tree, check whether it is a mirror of itself (ie, symmetric ar... 阅读全文
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Binary Tree Level Order TraversalTotal Accepted:79463Total Submissions:259292Difficulty:EasyGiven a binary tree, return thelevel ordertraversal of its... 阅读全文
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Minimum Depth of Binary TreeTotal Accepted:84038Total Submissions:283068Difficulty:EasyGiven a binary tree, find its minimum depth.The minimum depth i... 阅读全文
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Maximum Depth of Binary TreeTotal Accepted:107337Total Submissions:231121Difficulty:EasyGiven a binary tree, find its maximum depth.The maximum depth ... 阅读全文
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Balanced Binary TreeTotal Accepted:86508Total Submissions:263690Difficulty:EasyGiven a binary tree, determine if it is height-balanced.For this proble... 阅读全文